Big reveal: 'Actually I got on the scale today and it said that I am 50lbs down,' she said

'It really hurt my soul,' said the reality star. 'It changed how I am in public. I've tried to live more of a private life.'

The
Keeping Up With The Kardashians star attributed her apparently bloated
appearance during pregnancy to pre-eclampsia, a life-threatening
condition that raises blood pressure, which she said led to her
five-week premature delivery.

'That was a cause for a lot of the swelling and at the time I didn't know what was going on,' she said.

Kim showed off the impressive results - achieved by following the high-protein Atkins diet - in a daring lace dress.

Criticism: Kim's outfit at the Met Gala was roundly panned as unflattering

She wore her blonde hair sleek and wavy over her shoulder and kept her makeup fresh and natural.

Kim
and new fiance Kanye West kept out of the public eye following the
birth of their baby in June, but she denied they went into 'hiding'.

'I
just wanted to have time with her and be with her. This was the one
time in life that I could just take off and spend time as a family with
me, and him and the baby. So we both took a maternity leave,' she said.